The German, who is enjoying some of her finest form in her career, then raced into a 4-0 lead after breaking Clijsters serve twice.

From then on it was inevitable the 24-year-old would go on to win it, and with the German serving so well, all Clijsters could do was hold her final serve of the match before Kerber rounded off a convincing victory.

Kerber will now go on to play fellow German Sabine Lisicki who beat French Open champion Maria Sharapova on Monday.